Question

Is there a way in mysql to achieve

SELECT COUNT( SUM(field2) ) FROM TABLE WHERE field1='value' GROUP BY field2

Returning one row with the total sum of the counted field 2.

Field 1 && Field 2 are both not unique.

If there is a need for more info , just let me know.

Edit :
I was not thinking clear.
I need the COUNT of The COUNT.

so all the counted values from field 2.
this can be achieved by getting the number of rows , but I chose for this :

SELECT COUNT( first_count ) total_count FROM 
( SELECT COUNT( field2 ) as first_count FROM TABLE
  WHERE field1='value' GROUP BY field2 )t1

Or is there a faster query?

Cheers !

Answer 1

Your update

SELECT COUNT( first_count ) total_count FROM 
( 
  SELECT COUNT( field2 ) as first_count FROM TABLE
  WHERE field1='value' GROUP BY field2 )t1
)

Is a count of the COUNTs for each field2, which is the same as a count of unique field2s;

SELECT COUNT(DISTINCT field2) FROM TABLE WHERE field1='value'